Hi,
Hopefully this will be fruitful cooperation and sharing of experiences.
I have been using VOIP for sometime via sipgate mostly without problem but after changing ISP's and routers , that has changed.
I now have a sky router with my old Linksys PAP2 attached and a DECT phone attached to line 1.
I also have Suse, Ubuntu, and WinXP as OS's.
Once I get the config working I'll post it for future generations.